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Henry's Law constant

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Description of key information

Henry's Law constant: 0.0136 Pa-m3/mole 

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
at the temperature of:
25 °C

Additional information

The Henry's Law Constant (HLC) of tributyl benzene-1,2,4-tricarboxylate, calculated using the software HENRYWIN v3.20, leads to the following estimated results:


HLC= 1.87E-03 Pa-m3/mole (bond contribution)

HLC= 4.11E-04 Pa-m3/mole (group contribution)

HLC= 3.84E-02 Pa-m3/mole (VP/WS ratio)


It appears reasonable that the key HLC value, needed for the chemical safety assessment, can be the average of them:


HLC_key= 1.36E-02 Pa-m3/mole (1.34E-07 atm-m3/mole)


The above value indicates that the substance is essentially non volatile from surface water.